Type Vulnerability
On 21 October 2026, we released versions 19.5.1, 19.4.3, 19.3.6, 19.2.9, 19.1.9, 19.0.10, 18.11.13 for GitLab Community Edition (CE) and Enterprise Edition (EE).
GitLab
An issue has been discovered in GitLab CE/EE affecting all versions from 7.0 before 18.11.13, 19.0 before 19.0.10, 19.1 before 19.1.9, 19.2 before 19.2.9, 19.3 before 19.3.6, 19.4…
CVE-2026-110264
What this means
This is rated critical severity (10 out of 10). There is no confirmed exploitation of it yet. Ask IT whether Gitlab Gitlab is in your estate, and treat that as the priority.
Full vendor description
An issue has been discovered in GitLab CE/EE affecting all versions from 7.0 before 18.11.13, 19.0 before 19.0.10, 19.1 before 19.1.9, 19.2 before 19.2.9, 19.3 before 19.3.6, 19.4 before 19.4.3, and 19.5 before 19.5.1 that, under certain conditions, could have allowed an unauthenticated user to execute arbitrary code on the GitLab server due to integer overflow when compiling a specially crafted regular expression.
Scoring and exploitation
10.0/ 10
CVSS 3.1 base scoreCritical
Exploitable over the network without any account, and no one has to click or open anything. High impact on confidentiality, integrity and availability, and it can reach beyond the vulnerable system.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Exploitability
Longer bar: easier to attack
Attack vectorNetworkAV:N
Attack complexityLowAC:L
Privileges requiredNonePR:N
User interactionNoneUI:N
ScopeChangedS:C
Impact
Longer bar: more harm
ConfidentialityHighC:H
IntegrityHighI:H
AvailabilityHighA:H
- ~1.3% estimated chance of attack in 30 daysModel estimate (): a probability signal, not confirmed exploitation
- Exploited in the wild
- Not confirmed in the
- Not reported
Weaknesses
CWE-190
Affected products ()
- Gitlab Gitlab
Show the raw CPE strings (4)
- cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*
- cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*
- cpe:2.3:a:gitlab:gitlab:19.5.0:*:*:*:community:*:*:*
- cpe:2.3:a:gitlab:gitlab:19.5.0:*:*:*:enterprise:*:*:*
References
4 links from the CVE record, grouped by site; the vendor's advisory comes first.
docs.gitlab.com1 linkVendor advisory
- patch-release-gitlab-19-5-1-released (opens in a new tab)Release Notes · Vendor Advisory
gitlab.com1 link
- 633633 (opens in a new tab)Permissions Required
hackerone.com1 link
- 4093475 (opens in a new tab)Permissions Required
ruby-lang.org1 link